We develop modern designs to use European double seals on our door leaves to increase their isolations (insulation: 38db, air permeability:Class 1, Water Tightness: Class1, Resistance to Wind Load: Class C5-B5) instead of old fashioned frame seals which has low isolation level, ephemeral  and weak.  


 Okunma Sayısı : 3348         22 Ağustos 2014